EP1442806B1 - Apparatus for hydroforming a hollow body - Google Patents
Apparatus for hydroforming a hollow body Download PDFInfo
- Publication number
- EP1442806B1 EP1442806B1 EP04290264A EP04290264A EP1442806B1 EP 1442806 B1 EP1442806 B1 EP 1442806B1 EP 04290264 A EP04290264 A EP 04290264A EP 04290264 A EP04290264 A EP 04290264A EP 1442806 B1 EP1442806 B1 EP 1442806B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- frame
- hollow body
- central recess
- hydroforming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 4
- 238000004049 embossing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/039—Means for controlling the clamping or opening of the moulds
Definitions
- the present invention relates to a device for forming a metal hollow body or the like by introducing inside said hollow body of a fluid under high pressure according to a so-called hydroforming process.
- devices comprising a tool comprising a mold in two parts between which the hollow body to be formed are positioned, said mold being positioned under a press to compensate for the hydrostatic pressure of the fluid introduced into the hollow body.
- the pressure of the hydroforming fluid can reach 6000 bar, the tools of these devices are particularly bulky in order to withstand the forces induced by the pressure exerted inside the mold.
- the tool is fixed and positioned under the press, the frame of the generally parallelepiped-shaped press being provided with one or more jacks for closing the tool, so that said frame is also very large. which requires a major civil engineering that significantly increase the cost of these devices and ultimately hydroformed parts.
- the device consists of a fixed upper cap and a fixed lower base defining between them a hydroforming space for receiving a mold assembly comprising a lower plate and an upper plate, both generally rectangular.
- the lower base of the device comprises a guide extending from the hydroforming space to a position of loading-unloading, and possibly preforming, located outside said hydroforming space.
- the device further comprises means for moving the mold in order to move it from its loading-unloading position to its hydroforming position in the hydroforming space which has a height just greater than that of the mold set.
- devices for forming a hollow metal body or the like have already been devised by introducing inside said hollow body a fluid under high pressure according to a so-called "hydroforming" process.
- a frame consisting of an open hollow part adapted to receive the tool, said tool being introduced into the frame by translation along the axis of revolution of said frame.
- This device comprises a source of pressurized fluid, a cylindrical frame comprising a cylindrical central recess, a tubular piece to be formed and a tool comprising one or more parts in which is introduced a generally cylindrical mandrel.
- Said mandrel is able to be positioned inside the tubular part itself to be placed inside the tool which has a generally cylindrical central recess when the different parts of the tool are assembled.
- the source of pressurized fluid is connected to the mandrel placed inside the tubular part to be formed.
- This type of device has the disadvantage of not allowing the forming of parts of complex shapes, the parts to be able to accommodate the mandrel.
- One of the aims of the invention is therefore to remedy all these disadvantages by providing a hydroforming device of simple and inexpensive design to optimize the tools and reduce the size of these devices.
- a device for forming a metal hollow body or the like by introducing inside said hollow body of a fluid under high pressure according to a process known as hydroforming said device comprising on the one hand, at least one tool consisting of at least two parts respectively provided with a draft and adapted to receive the metal hollow body to be formed, and secondly a frame made of a part hollow open at least one of its ends and able to accommodate the tooling; this device is remarkable in that it has an arrangement according to claim 1.
- the device consists of a frame 1 of generally parallelepipedal shape comprising a central recess 2 frustoconical section shaped regular hexagon, that is to say a central recess 2 of section in the form of regular hexagon whose section narrows from its upper end to its bottom, said central recess 2 being directed upwards.
- the central opening 2 of the frame 1 is adapted to receive a tool 3 consists of two parts 3a and 3b respectively provided with an undercut 4, 4b which is positioned in the hollow metal body 5 to be formed.
- the device furthermore comprises a tubular structure constituted by uprights 15 of crosspieces 16 and longitudinal members 17 extending above the frame 1 and carrying pipes 18 for supplying pressurized fluid connected to a pressurized fluid generator 19 controlled by a control panel 20.
- the tooling 3 is introduced by vertical translation in the central recess 2 of the frame 1 by moving upwardly the frame 1 along the uprights 15 of the structure 14 by means of hydraulic cylinders for example, not shown in Figure 4.
- the remains 4 a , 4 b of the tool 3 may include stamping means, such as an undercut for example, which stamps the hollow body 5 during the introduction of the tool 3 in the recess 2 of the frame.
- stamping means such as an undercut for example, which stamps the hollow body 5 during the introduction of the tool 3 in the recess 2 of the frame.
- water under pressure is introduced into the hollow body 5 during said pre-forming, the pressure of the water being preferably slightly lower the pressure exerted by the undercut on the hollow body 5.
- the tool 3 can be introduced into the central recess 2 of the fixed frame 1 by a vertical translation of said tool 3 by means of hydraulic cylinders without departing from the scope of the invention.
- the central recess 2 of the frame 1 may have a regular or irregular polygon section.
- the tool 3 further comprises an input channel not shown extending from one end of said equipment 3 and opening into the volume defined by the bodies 4, 4b of said equipment 3 and an outlet channel not shown extending from a second end of said tooling 3 and opening into said volume defined by the bodies 4a, 4b of the tools 3.
- a pressurized fluid said hydroforming fluid is introduced through the inlet channel to the inside the hollow body 5 positioned in the tool 3, the outlet channel being closed by closure means, not shown in the figure.
- Ways feed 19 provide the hydroforming fluid at a hydroforming pressure P1 of up to 6000 bar.
- the outlet channel is open to allow the escape of the hydroforming fluid introduced into the tool 3.
- the tool 3 comprises more than two parts thus forming a plurality of joint planes, at least two separate joint planes, which make it possible to hydroform parts of complex shapes.
- the devices of the prior art comprising a hydraulic press have a single joint plane which prevents the production of complex shaped parts, the demolding of the hydroformed part can be performed only in one plane.
- the devices of the prior art can of course include retractable drawers housed in the tool, which significantly affect the manufacturing costs of these tools.
- the frame 1, the central recess 2, the tool 3 comprises sealing means not shown in the figures as well as sensors positioned in particular in the bodies 4a, 4b of the tools 3 to to measure the pressures, without departing from the scope of the invention.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
Description
La présente invention concerne un dispositif pour le formage d'un corps creux métallique ou analogue par l'introduction à l'intérieur dudit corps creux d'un fluide sous haute pression suivant un procédé dit d'hydroformage.The present invention relates to a device for forming a metal hollow body or the like by introducing inside said hollow body of a fluid under high pressure according to a so-called hydroforming process.
Dans le domaine des dispositif d'hydroformage de corps creux métalliques notamment, communément appelés cellules d'hydroformage, on connaît bien des dispositifs constitués d'un outillage comprenant un moule en deux parties entre lesquelles est positionné le corps creux à former, ledit moule étant positionné sous une presse pour compenser la pression hydrostatique du fluide introduit à l'intérieur du corps creux.In the field of hydroforming devices for metal hollow bodies in particular, commonly known as hydroforming cells, devices comprising a tool comprising a mold in two parts between which the hollow body to be formed are positioned, said mold being positioned under a press to compensate for the hydrostatic pressure of the fluid introduced into the hollow body.
La pression du fluide d'hydroformage pouvant atteindre 6000 bars, les outillages de ces dispositifs sont particulièrement volumineux afin de résister aux efforts induits par la pression s'exerçant à l'intérieur du moule. De manière classique l'outillage est fixe et positionné sous la presse, le bâti de la presse de forme globalement parallélépipédique étant muni d'un ou plusieurs vérins pour assurer la fermeture de l'outillage, de sorte que ledit bâti est également très volumineux ce qui nécessite un génie civil important qui grève considérablement le coût de ces dispositifs et in fine des pièces hydroformées.The pressure of the hydroforming fluid can reach 6000 bar, the tools of these devices are particularly bulky in order to withstand the forces induced by the pressure exerted inside the mold. In a conventional manner the tool is fixed and positioned under the press, the frame of the generally parallelepiped-shaped press being provided with one or more jacks for closing the tool, so that said frame is also very large. which requires a major civil engineering that significantly increase the cost of these devices and ultimately hydroformed parts.
Afin de limiter l'encombrement de ces dispositifs, on a déjà imaginé des dispositifs comprenant un outillage mobile qui permet de charger la pièce à former dans le moule à l'extérieur du bâti de presse ; c'est le cas par exemple du brevet
Bien que ce type de dispositif présente un volume et un poids moindre que les dispositifs d'hydroformage à chargement sous presse, leur encombrement reste néanmoins trop important.Although this type of device has a volume and a weight less than press-loading hydroforming devices, their size remains nevertheless too important.
Afin de remédier à cet inconvénient, on a déjà imaginé des dispositifs pour le formage d'un corps creux métallique ou analogue par l'introduction à l'intérieur dudit corps creux d'un fluide sous haute pression suivant un procédé dit « d'hydroformage » comprenant un bâti constitué d'une pièce creuse ouverte apte à accueillir l'outillage, ledit outillage étant introduit dans le bâti par translation le long de l'axe de révolution dudit bâti. C'est le cas, par exemple, du brevet américain
Ce type de dispositif présente l'inconvénient de ne pas permettre le formage de pièces de formes complexes, les pièces devant être aptes à accueillir le mandrin.This type of device has the disadvantage of not allowing the forming of parts of complex shapes, the parts to be able to accommodate the mandrel.
L'un des buts de l'invention est donc de remédier à tous ces inconvénients en proposant un dispositif d'hydroformage de conception simple et peu onéreuse permettant d'optimiser les outillages et de réduire l'encombrement de ces dispositifs.One of the aims of the invention is therefore to remedy all these disadvantages by providing a hydroforming device of simple and inexpensive design to optimize the tools and reduce the size of these devices.
A cet effet et conformément à l'invention, il est proposé un dispositif pour le formage d'un corps creux métallique ou analogue par l'introduction à l'intérieur dudit corps creux d'un fluide sous haute pression suivant un procédé dit d'hydroformage, ledit dispositif comportant d'une part, au moins un outillage constitué d'au moins deux parties respectivement munies d'une dépouille et aptes à accueillir le corps creux métallique à former, et d'autre part un bâti constitué d'une pièce creuse ouverte à au moins l'une de ses extrémités et apte à accueillir l'outillage ; ce dispositif est remarquable en ce qu'il présente une disposition conforme à la revendication 1.For this purpose and in accordance with the invention, there is provided a device for forming a metal hollow body or the like by introducing inside said hollow body of a fluid under high pressure according to a process known as hydroforming, said device comprising on the one hand, at least one tool consisting of at least two parts respectively provided with a draft and adapted to receive the metal hollow body to be formed, and secondly a frame made of a part hollow open at least one of its ends and able to accommodate the tooling; this device is remarkable in that it has an arrangement according to
D'autres avantages et caractéristiques ressortiront mieux de la description qui va suivre d'une variante d'exécution donnée à titre d'exemple non limitatif du dispositif pour le formage d'un corps creux métallique conforme à l'invention en référence aux dessins annexés sur lesquels :
- la
figure 1 est une représentation schématique en perspective d'une variante d'exécution du dispositif d'hydroformage selon l'invention.
- the
figure 1 is a schematic representation in perspective of an alternative embodiment of the hydroforming device according to the invention.
En référence à la
Il va de soi que l'outillage 3 peut être introduit dans l'évidement central 2 du bâti 1 fixe par une translation verticale dudit outillage 3 au moyen de vérins hydrauliques sans pour autant sortir du cadre de l'invention.It goes without saying that the
Par ailleurs, il va de soi que l'évidement central 2 du bâti 1 peut présenter une section de polygone régulier ou irrégulier.Furthermore, it goes without saying that the central recess 2 of the
L'outillage 3 comprend, par ailleurs, un canal d'entrée non représenté s'étendant depuis une première extrémité dudit outillage 3 et débouchant dans le volume délimité par les dépouilles 4a,4b dudit outillage 3 et un canal de sortie non représenté s'étendant depuis une seconde extrémité dudit outillage 3 et débouchant dans ledit volume délimité par les dépouilles 4a,4b de l'outillage 3. Un fluide sous pression dit fluide d'hydroformage est introduit par le canal d'entrée à l'intérieur du corps creux 5 positionné dans l'outillage 3, le canal de sortie étant obturé par des moyens de fermeture, non représentés sur la figure. Les moyens d'alimentation 19 fournissent le fluide d'hydroformage à une pression d'hydroformage P1 pouvant atteindre 6000 bars.The
Après le formage du corps creux métallique 5, le canal de sortie est ouvert pour permettre l'échappement du fluide d'hydroformage introduit dans l'outillage 3.After the forming of the metal hollow body 5, the outlet channel is open to allow the escape of the hydroforming fluid introduced into the
Selon une variante d'exécution particulièrement avantageuse, l'outillage 3 comprend plus de deux parties formant ainsi plusieurs plans de joints, au moins deux plans de joints distincts, qui permettent de réaliser l'hydroformage de pièces de formes complexes. De plus, on observera que les dispositifs de l'art antérieur comprenant une presse hydraulique présentent un seul plan de joint qui empêche la réalisation de pièces de formes complexes, le démoulage de la pièce hydroformée ne pouvant s'effectuer que suivant un seul plan. Afin de pallier cet inconvénient, les dispositifs de l'art antérieur peuvent bien évidemment comprendre des tiroirs escamotables logés dans l'outillage, ce qui grève considérablement les coûts de fabrication de ces outillages.According to a particularly advantageous variant embodiment, the
Il est bien évident que le bâti 1, l'évidement central 2, l'outillage 3 comprennent des moyens d'étanchéité non représentés sur les figures ainsi que des capteurs positionnés notamment dans les dépouilles 4a, 4b de l'outillage 3 afin de mesurer les pressions, sans sortir du cadre de l'invention.It is obvious that the
Enfin, il est bien évident que les exemples que l'on vient de donner ne sont que des illustrations particulières, en aucun cas limitatives quant aux domaines d'application de l'invention.Finally, it is obvious that the examples which have just been given are only particular illustrations, in no way limiting as to the fields of application of the invention.
Claims (5)
- Device for forming a metal or similar hollow body (5) by introducing inside said hollow body (5) a high-pressure fluid according to a so-called hydroforming method, said device comprising at least one tool (3) consisting of at least two parts (3a, 3b) respectively provided with a draught (4a, 4b) and suitable for receiving the metal hollow body (5) to be formed, and a frame (1) consisting of a hollow revolution part open at at least one of the ends thereof and suitable for receiving the tool (3), characterised in that the frame (1) comprises a central recess (2) of a tapered shape oriented upwards and suitable for receiving the tool (3) also having a tapered shape, in that the device comprises a tubular structure (14) consisting of vertical girders (15), said tool (3) being introduced into the central recess (2) of the frame (1) by means of vertical translation along the vertical girders (15) of the structure (14).
- Device according to claim 1 characterised in that the tubular structure (14) comprises longitudinal girders (17) extending above the frame (1) and supporting pressurised fluid feed tubes (18).
- Device according to any of the above claims, characterised in that it comprises hydraulic cylinders arranged to move the frame (1) upwards to introduce the tool (3) by means of vertical translation along the vertical girders (15) of the structure (14) in the central recess (2) of the frame (1).
- Device according to any of claims 1 to 2, characterised in that it comprises hydraulic cylinders arranged to introduce the tool (3) into the central recess (2) of the fixed frame (1), by means of a vertical translation of said tool (3).
- Device according to any of the above claims, characterised in that the draughts (4a, 4b) of the tool (3) comprise embossing means to emboss the hollow body (5) during the introduction of the tool (3) into the central recess (2) of the frame (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0301111A FR2850593B1 (en) | 2003-01-31 | 2003-01-31 | DEVICE FOR HYDROFORMING A HOLLOW BODY |
FR0301111 | 2003-01-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1442806A1 EP1442806A1 (en) | 2004-08-04 |
EP1442806B1 true EP1442806B1 (en) | 2008-03-26 |
Family
ID=32605976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04290264A Expired - Lifetime EP1442806B1 (en) | 2003-01-31 | 2004-02-02 | Apparatus for hydroforming a hollow body |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1442806B1 (en) |
AT (1) | ATE390223T1 (en) |
DE (1) | DE602004012630T2 (en) |
ES (1) | ES2305674T3 (en) |
FR (1) | FR2850593B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018203987B3 (en) | 2018-03-15 | 2019-03-21 | Bayerische Motoren Werke Aktiengesellschaft | Tool for forming and method for producing a component and use of a tool |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3535901A (en) * | 1966-06-03 | 1970-10-27 | Tokyu Car Corp | Mold for forming material by means of impulsive hydraulic pressure |
US3685327A (en) * | 1969-11-12 | 1972-08-22 | Masanobu Nakamura | Bulging apparatus |
US5170557A (en) * | 1991-05-01 | 1992-12-15 | Benteler Industries, Inc. | Method of forming a double wall, air gap exhaust duct component |
US5582052A (en) * | 1993-05-20 | 1996-12-10 | Benteler Industries, Inc. | Controlled time-overlapped hydroforming |
DE19705244A1 (en) * | 1997-02-12 | 1998-08-13 | Huber & Bauer Gmbh | Forming device |
BR9810899A (en) * | 1997-07-18 | 2000-09-26 | Cosma Int Inc | Process of forming an elongated tubular metal member, and, equipment to form a tubular metal part in an elongated tubular metal member. |
DE19810196A1 (en) * | 1998-03-10 | 1999-09-16 | Schade Gmbh & Co Kg | Bending, calibrating and fine shaping process for beads, resting surfaces and/or conical areas of hollow strips |
DE19839526C1 (en) * | 1998-08-29 | 1999-11-18 | Daimler Chrysler Ag | Method of pressing metal component from sheet blank |
US6134931A (en) * | 1999-05-26 | 2000-10-24 | Husky Injection Molding Systems Ltd. | Process and apparatus for forming a shaped article |
US6305204B1 (en) * | 2000-07-13 | 2001-10-23 | The Boeing Company | Bulge forming machine |
-
2003
- 2003-01-31 FR FR0301111A patent/FR2850593B1/en not_active Expired - Fee Related
-
2004
- 2004-02-02 DE DE602004012630T patent/DE602004012630T2/en not_active Expired - Lifetime
- 2004-02-02 ES ES04290264T patent/ES2305674T3/en not_active Expired - Lifetime
- 2004-02-02 AT AT04290264T patent/ATE390223T1/en not_active IP Right Cessation
- 2004-02-02 EP EP04290264A patent/EP1442806B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2305674T3 (en) | 2008-11-01 |
DE602004012630T2 (en) | 2009-04-30 |
EP1442806A1 (en) | 2004-08-04 |
ATE390223T1 (en) | 2008-04-15 |
FR2850593B1 (en) | 2006-09-08 |
FR2850593A1 (en) | 2004-08-06 |
DE602004012630D1 (en) | 2008-05-08 |
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